Method of making insulating covering for joints and repaired places of electrical conductors in situ



March 31'. 1925. 1,531,437

METHOD OF MAKING INSULATING COVERING FOB JOINTS AND H. HAVENITH ET AL REPAIRED PLACES OF ELECTRICAL CONDUCTORS IN SITU 2 Sheets-Sheet 1 Filed June 26 MIMIQ March 31. 1925. 1,531,437

' H. HAVENITH ET AL. I

METHQD-OF'MAK-ING INSULATING COVERING FOB JOINTS AND REPAIRED PLACES OF ELECTRICAL CONDUGTORS IN SITU Fileq June 26. 1924 2 Sheets-Sheet 2 Patented Mar. 31, 1925.

UNITED STATES P -HERMANN HAVENIT'H AND ERNST STUDT, OF NORDENHAM ON -THE WESEB, GER- MANY, ASSIGNORS r0 nonnnnurscnn SEEKAIBELWERKE AKTIENGESELLSGI-IAFT, or NORDENHAM on THE w-EsEn; ERM NY,

METHOD OF MAKING INSULATING COVERING FOR JOINTS AND ELECTRICAL CONDUCTORS IN SITU.

REPAIEEZD PLACES OF Application filed June 26, 1924. Serial 'No.'722;598;

To all whom it may concern: 7

Be it known that we, HERMA N Him/EN- rrH, a citizen of the German Republic, and residing at f Elisabethstrasse, Nordenhani on the @Ve'ser, Germany, and Easter STUD'r, a citizen of the German Republic, and residing at M Hafenstrasse, Nordenham on.

the lVeser, Germany, have nvented contain new and useful Methods of Making Insulating Covering for Joints and Repaired Places of Electrical Conductors in s'itu, of which the following is a specification.

lVhen the dielectric parts cit-electric conductors insulated; with guttaperehja .or the like at the soldered and repaired places are jointed by hand, as is done in most cases at the present time, such places'sooner or later frequently prove to be electrically weak or even develop faults. Apparatus proposed for carrying out this work (for instance German Patent 8897) have not been generally adopted owing to various disadvantages from which they suffer.

The object of the present invention is to overcome these disadvantages by a new method and the use of forming means and the like, which ensures the making of an insulation by mechanical means, which is reliable and durable under all conditions, at the dielectric joints (soldered and repaired places and the like). According to the invention the insulating material is applied to and distributed over the stationary piece of cable, which is held between securing means, at the place to be insulated by drawing or rolling by means of distributing devices, which are closed around the cable and are adapted to be moved longitudinally of the present invention Fig. 2 an end elevation and Fig, 3 a plan view of one constructional form and p 4 aside elevation,

Fig. 5 an end elevation and 1 Fig. .6 a plan view of another construc-' tional form of an apparatus for carrying out the new method, only the essential parts being shown.

In the apparatus for applying and .distributing the material ,over the soldered joint by dr;awv-ing,show1 1 in Figsyl ,to 3, the previously heated insulating material, which is for instance applied at one end of the joint, is drawn overtheplace to be in su'late'd by a die consisting of two hinged parts and having a removable bush, the bore otwhich corresponds to the thickness of the conductor being covered. The .die is positively guided for keeping it central and is previously heatedv to the required temperature. The ends of the applied covering are wiped in the usual manner.

In the apparatus shown hinged bearings F, F mounted on a frame are provided with suitable bushes g, g for-various diameters of conductors, in which the part of the conductor to be insulated is gripped. The die '5 with an inserted part is is adapted to slide on the guide bars h, it along which it can be drawn by means of knobs m, m, whereby the prevously applied insulating material n is drawn overthe place to be insulated. After the conductor has been removed fromthe apparatus, the unimportant operation of smoothing down the portions of the applied covering, which does not in any way aifect the electric strength, is'carried out.

Inthe apparatus for applying and distributing the material by rolling, shown in Figs. et-6, a pair of positively guided rollers are provided, the peripheries of which are grooved in accordance with the shape of the part of the conductor 75/, p is a pair ofrollers a, a, which prevents the insulating material escaping laterally when being pressed on to the conductor and feeds the said material to the profiled rollers 29, 7'). For enabling the part of the conductor, which is to be insulated, to be introduced between the rollers, the apparatus consists of two parts, which can be taken apart. The joint orrepaired place of the conductor, is covered with the insulating material, by the system of rollers being moved to and fro over the joint or repaired places by means of the knobs V, V. The insulating material, which has been a'pplied to the conis rolled down firmly by the pressure ductor,

to be insulated of the rollers on to the place and. is given the required shape by the grooves in the periphery of the rollers.

What we claim is 1. A method of making a durable dielectric connection at the soldered joints and repaired places of electric conductors insulated with guttapercha and the like, consisting in holding the part of the cable containing the soldered joint or repaired place between gripping members, applying insulating material in a heated state at one end of the place to be insulated and passing a distributing device, which embraces the said material, along it, whereby the insulating ma terial is spread over the part'of the cable to be covered, as set forth.

2 A method of making a durable dielectrio connection at the soldered joints and 3. A method of making a durable dielec tric connection at the soldered joints and repaired places of electric conductors 1nsulated with guttapercha or the like, cons1st-' ing in'holding the part of the cable containing the soldered joint or repaired place be- 7 tween gripping members, applying insulating material in a heated state at one end of the place to be insulated and passing a rolling device, which einbracesthe said material, along it, whereby the insulating material is rolled on to the part of the. cable to be covered, as set'forth.

In testimony whereof we have signed our names to this specification.

HERMANN HAVENITH. ERNST STUDT.

Witnesses: I V

FRANCIS J. DUGAN, L. A. GRESHAMJ 

